Animal Kingdom Question And Answers

Biology Class 11 WBCHSE Animal Kingdom Questions And Answers

Question 1. Classify animals on the basis of the occurrence of coelom.
Answer:

On the basis of the occurrence of coelom, animals are of three types—

1. Coelomate: animals having true coelom,
2. Acoelomate: animals lacking coelom,
3. Pseudocoelomate: animals having false or pseudocoelom.

Question 2. Mention the types of animals on the basis of germ layers.
Answer:

Types of animals

On the basis of germ layers, animals are of two types—diploblastic (ectoderm and endoderm present) and triploblastic (ectoderm, endoderm and mesoderm are present).

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Question 3. How many types of symmetry are observed in animals?
Answer:

Five types of symmetry are observed in animals.

These are—

1. Bilateral symmetry,
2. Radial symmetry,
3. Spherical symmetry,
4. Biradial symmetry and
5. Asymmetrical symmetry.

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Question 4. What is memorization?
Answer:

Memorization:

The method of division of the body into many identical segments is called metamerisation. Each segment formed is called a metamere.

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Question 5. What is haemocoel and spongocoel?
Answer:

Haemocoel and Spongocoel

The body cavity filled with body fluid is called hemocoel and the central cavity in the body of the sponge is called spongocoel.

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Question 6. What are the types of pores seen in the body of sponges?
Answer:

Types of pores

Two types of pores are seen in the body of sponges—Ostia: Fine pores present in the body surface which help in the intake of water. Oscuium: A large pore present at the apex of the body through which water goes out.

Question 7. Which organism has myoneme microfilaments? What is their function?
Answer:

Myoneme microfilaments are found in the protozoa Monocystis. These myoneme microfilaments help in locomotion.

Question 8. What are protostome and deuterostome?
Answer:

Protostome 

The animals in which the mouth cavity develops first from the blastopore of the embryo are called protostomes.

Deuterostome

The animals in which the anal pore develops first from the blastopore of the embryo are called deuterostomes.

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Question 9. Name some mesenchymal cells.
Answer:

Some mesenchymal cells are—pinacocytes, amoebocytes, scleroblasts, etc.

Question 10. What are tunicates?
Answer:

tunicates

The body of organisms belonging to the subphylum Urochordata bear a translucent cover outside their bodies, which is called a tunic. So, these organisms are called tunicates.

Biology Class 11 WBCHSE Animal Kingdom Very Short Answer Type Questions

Question 1. What are the three types of body cavities found in animals?
Answer: Pseudocoelom, hemocoel, and coelom

Question 2. Which phylum shows metamerism?
Answer: Annelida

Question 3. Name two groups of animals that have in complete alimentary canal.
Answer: Cnidaria, Platyhelminthes

Question 4. Which animals are triploblastic?
Answer: From phylum Platyhelminthes to Chordata, all animals are triploblastic.

Question 5. Give one example of each—symmetry, radial and bilateral symmetry.
Answer: Amoeba, Hydra, fishes

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Question 6. Give one example of each of acoelomate, pseudocoelomate and haemocoelomate.
Answer: Liver fluke, roundworm, cockroach

Question 7. Give one example each of diploblastic and triploblastic animals.
Answer: Hydra, tapeworm

Question 8. Name the organs that carry out pulmonary and bronchial respiration.
Answer: Lungs, gills

Question 9. Name two cellular layers of the body of sponges.
Answer: Ectoderm and endoderm

Question 10. Which phylum of the animal kingdom shows the least level of body organization?
Answer: Protozoa (it is a sub-kingdom: Seven Phyla are included within this subkingdom).

 

Classification Of Animal Kingdom Class 11

Question 11. Name one sanguivorous annelid.
Answer: Leech

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Question 12. Which organs in echinoderms serve for respiration and locomotion?
Answer: Papulae and tube feet

Question 13. Which non-chordate shows the capability of flying?
Answer: Arthropoda

Question 14. Which poison is found in the cnidoblast cells of coelenterates?
Answer: Hypnotoxin

Question 15. What are the respiratory organs of fish?
Answer: Gills and lungs

Question 16. Name one fish that possesses both gills and lungs.
Answer: Lungfish

Question 17. What is meant by aestivation?
Answer:

Aestivation

The characteristic of some animals is that body metabolism reduces to a basal level due to dry or hot weather. This is known as aestivation.

Classification Of Animal Kingdom Class 11

Question 18. Name one vertebrate which is a living fossil.
Answer: Coelacanth fishes

Question 19. Which larva is found in the phyla Annelida and Mollusca?
Answer: Trochophore larva

Question 20. Which type of mouth appendages are found in cockroaches, mosquitoes, and houseflies?
Answer: Bitting type of mouth appendages are found in cockroaches and houseflies. Sucking type of mouth appendages are found in mosquitoes.

Question 21. Name the anticoagulant present in the saliva of leech.
Answer: Hirudin

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Question 22. Name two viviparous fishes.
Answer: Shark and eagle ray

Question 23. Name one animal phylum whose members have an open circulatory system.
Answer: Mollusca

Question 24. Name the excretory organs of annelids and insects.
Answer: Nephridia and malpighian tubules

Question 25. Write the scientific name of the bath sponge.
Answer: Euspongia sp

Question 26. Which type of structural organization is observed in the phylum Cnidaria?
Answer: In this phylum, the tissue grade of organization is observed for the first time. They exist as true multicellular animals.

Question 27. In which phylum stomochord is found?
Answer: Hemichordata

Question 28. Name the cells that maintain water circulation in the body of poriferans.
Answer: Choanocyte

Classification Of Animal Kingdom Class 11

Question 29. Name three parasitic worms.
Answer: Hookworm, roundworm and tapeworm

Question 30. Name one animal of the phylum Mollusca that shows body segmentation.
Answer: Neopilina

Question 31. Name one jawless vertebrate animal.
Answer: Petromyzon

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Question 32. Which is the sound-producing organ in birds?
Answer: Syrinx

Question 33. Which class of vertebrates are viviparous animals?
Answer: Mammalia

Question 34. Name two vertebrates that have cloacal aperture,
Answer: Toad and Pigeon

Question 35. Write one example for each of the poikilothermal and homeothermal animals.
Answer: Frog and cow

Biology Class 11 WBCHSE

Question 36. The water vascular system is the characteristic of which group of the following—

1. Porifera
2. Ctenophora
3. Echinodermata
4. Chordata

Answer: Echinodermata

Question 37. Identify the phylum in which adults exhibit radial symmetry and larvae exhibit bilateral symmetry.
Answer: Echinodermata

Question 38. Name one shell-less mollusk.
Answer: Doris

Question 39. Give one example of—

1. A Reptile without a limb
2. One oviparous mammal

Answer:

1. Snake (reptile),
2. Platypus

Question 40. Give one example each of a social and a polymorphic animal.
Answer: Honey bee (social) and chameleon (polymorphic)

Question 41. Which is the first phylum that includes triploblastic animals?
Answer: Platyhelminthes

Question 42. In some animal groups, the body is found to be divided into compartments with at least some organ/organs repeated. Name the characteristic
Answer: Metamerism

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Question 43. Name an animal having a canal system and spicules. feature.
Answer: Scypha

Question 44. What is the role of radula in Mollusca?
Answer: Radula is used for cutting or scraping food.

Question 45. Provide appropriate technical terms—

1. Free-floating form of Cnidaria
2. Stinging organ of jellyfish

Answer:

1. Medusa
2. Cnidoblast

Question 46. Give an example of a roundworm,
Answer: Ascaris

Question 47. Name the animal which exhibits the phenomenon of bioluminescence. Mention the phylum to which it belongs.
Answer: Firefly, Phylum Arthropoda

Question 48. Provide appropriate technical terms for lateral appendage in aquatic annelids.
Answer: Parapodia

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Question 49. How important is the presence of an air bladder in Pisces?
Answer: Air bladder provides buoyancy that helps them to float in water.

Question 50. What is the importance of pneumatic bones and air sacs in Aves?
Answer: Pneumatic bones make their body lighter which helps them to fly. Air sacs provide more area for the intake of air and respiration.

Question 51. Give one example each for an animal possessing placoid scales and cycloid scales.
Answer: Placoid scales—Scoliodon

Cycloid scales—Labeo

Question 52. Segmentation in the body is first observed in which of the following?

1. Platyhelminthes
2. Aschelminthes
3. Echinodermata
4. Arthropoda

Answer: Platyhelminthes